var zab_cost, zab_meters, zab_total;
function zab_meters_c () {
zab_meters = document.zabor.meters_zabor.value;	
}
function zabor_calc()
        {
zab_cost = 0;
        if (document.zabor.zabor_1.checked) { zab_cost = zab_cost + 1;}
        if (document.zabor.zabor_2.checked) { zab_cost = zab_cost + 8;}
        if (document.zabor.zabor_3.checked) { zab_cost = zab_cost + 90;}
        if (document.zabor.zabor_4.checked) { zab_cost = zab_cost + 40;}
		if (document.zabor.zabor_5.checked) { zab_cost = zab_cost + 60;}
zab_total = zab_cost * zab_meters;
document.zabor.zab_result.value = zab_total;
}